Pneumatic pump



J L WRAY PNEUMATIC PUMP Filed-May 9, 1921 7 July 17, 1923- Patented July 17, 1923.

JAMES L. WRAY, OF ROCK ISLAND, ILLINOIS.

PNEUMATIC PUMP.

Application filed May 9, 1921. Serial No. 467,873.

To allwhomitmag concern: 7

Be it known that I, JA nsL. WRAY, a citizen of the United States, residing at Rock Island, in the county of Rock Island and State of Illinois, have invented a new and useful Pneumatic Pump, of which the following is a specification.

This invention relates to pneumatic pumps designed primarily for hoisting water, oil or other fluids, one of its objects being to provide a device of this character which does not require the use of springs or stutfing boxes, needle valves, or other parts likely tocause trouble and interfere with the proper operation of the mechanism.

Another object is to provide mechanism of this character which, when coupled with a supply of air under pressure, will operate intermittently to elevate the liquid admitted to the apparatus.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that, within the scope ofv what is claimed, changes in the precise embodiment of the invention shown can be made without de parting from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings Figure 1 is a longitudinal section through the upper portion of the apparatus constituting the present invention w Figure 2 is a longitudinal section through 49 the lower portion thereof.

Figure 3 is a section through the casing.

of the pressure controlling valve.

Referring to th figures by characters of reference 1 designates an elongated cylindrical pump casing adapted to be submerged and provided, at its lower end, with ahead 2 the upper end of which constitutes a valve seat 3 while the lower portion thereof constitutes aguard or cage as shown at 4. In this head are provided guides 5 for the stem 6 of a valve 7. This valve is normally mounted on the seat 3 so as to prevent liquid from flowingdownwardly out of the casing 1 after it has once entered the casing.

- The upper end of the casing 1 is closed bya head 8 having projections9 thereon for engagement by a suitable wrench or other tool whereby the head can be readily screwed into or out of position. Extending downwardly from this head 8 is a tubular projection 10 having an inlet port 11 in the wall thereof and an outlet port or vent 12 extending through the head '8. A valve 13 is slidably mounted within the extension 10 .and is connected to a stem 14 slidable in the head 8 and adapted to be operated by any suitable means indicated generally at 15. This valve 13 is normally i'n'position to close the vent12 but by forcing it downwardly past the inlet port 11 liquid can be admitted to the casing 1 through the head 8. This actuation of the valve 13 is only effected in emergencies whenthe air pressure hereinafter referred to is not sutficien't tocause the, complete operation of the mechanism and it is desired to reset] the parts without taking the mechanism apart after withdrawing it from the well or otherbody of liquid. q

Extending through the top head 8 is a liquid outlet pipe 15 to which is connected a supply pipe 16 which hangs from the head 8 and within the casing 1. Thissupply pipe is provided at its lower end and. closet'o thevalve 7, with a casing 17, having an inlet 18 at its lower end. A check valve 19 is mounted in this casing and is adapted normally to close the inlet .18 so as to hold the pipes 16 and'15 primed. Arranged within the upper portion of the casing 1 is a valve casing 20 open ,atits ends and provided, at an intermediate point, with an annular series of outlets 521. Opening into this casing 20 between theports 21 and the" lower end of the casing is a .passage 22 adapted to receive air under pressure from a pipe 28 which opens through the head 8 of the casing and extends from a suitable storage tank or' the like having a supply of air under pressure. An exhaust passage 24 opens into the casing 20 between the portsfll and the upper end of the casing, this passage preferably communicating with the casing 20 through a cluster of ports indicated at 25. The passage 24 is adapted to discharge through the head 8 into a suitable exhaust pipe provided therefor and which has been indicated by slidably mounted withi "with the exhaust passage 24 elevate the float is a valve 27 having heads 28 and 29 at the ends thereof and an intermediate packing ring or flange 30. The stem of the valve projects upwardly as indicated at 31 and is pivotally attached to a lever 32. This lever is pivotally mounted, at one end upon the casing 20, as shown at 33, while its other end projects into the forked upper end of an elongated weight 34. This forked end is pivotally connected, above the lever 32, to a main lever 35, as indicated at the said lever 35 being fulcrumed between its ends in a bracket 37 extending downwardly from the head 8. The other end of the main lever 35 is pivotally attached to a block-38 from which projects a lug 39. A

rod 40 extends downward from this block and is secured to a finger ll radiating from a collar 42 secured on a sleeve 43 wh ch is slidably mounted on the pipe 16. A float 4A is carried by this sleeve.

A collar 45 is secured to the upper portion of the pipe 16 and normally supports a float as which is slidable ontlie pipe 16 and has an upwardly projecting tripping finger 47. A hanger 4:8 extendsdownwardly from the head 8 and has a latch 49 pivoted thereon and normally engaging the lug 39 so as to hold the levers 35 and 32 and the valve 27 normally positioned as shown in Figure 4 out of communication with the ports 21. A link 50 connects the latch 49 to one end of a lever 51.

which is fulcrumed on the hanger 4:8 and projects into the path of the finger 47.

lVhen the parts are thus located the valve 27 will be secured in the position shown in the drawings.

Assuming that the ports 21 are in communication with the exhaust passage 24 and that the piston head 28 is closing; the out let of the passage 22, then the liquid in which the casing 1 is submerged, seeking its level, will rise through the head 2, lifting the valve 7 from its seat. As the liquid continues to rise it will pass above the float 44 because this float is held down by the latch 49 engaging the lug 39. As the level of the liquid continues to rise it will come against and 4&6 causing the finger ultimately to move against the lever 51.

This will cause the latch 529 to become disengaged from the lug 39 with the result that the released float 44- will promptly move 'upward a limited distance, carrying with it the rod 10. This movement will be accelerated by the weight 34 and motion will be transmitted through lever to the valve 27 which will be shifted promptly so as to close communication between the ports 21 and the exhaust passage 24: and open communication between the passage 22 and said ports. You sequently air under pressure will immediately rush into the casing l and press the liquid from said casing and upwardly" through the pipe 16 to pi no This action will continue until the flo it moves downwardly with the level of the liquid so as to pull on the rod i an d reset the parts 39 and 49 and at the same time shift the alve 25% to place the ports 21 in communication with the exhaust passage 2-41- and to close the outlot of the pressure passage 22. Thus the operation just described will be repeated.

What is claimed is 1. Apparatus of? the class described including a casing having valved liquid inlet at its lower end, an outlet pipe extendi from the casing: and having a valved inlet at its lower end and adjacent the bottom of the casing a valve casinp; having pressure inlet and an exhaust said casing beino; provided with a port in communication with the interior of the casing: of the apparatus. valve slidable within the valve casing and shitta-ble to place said port in communication either with the pressure inlet or the exhaust, means for locking); the valve in haust position, a lower float within the cas inc; of the apparatus and normally held depressed hy said lockin o means, an upper float shiitable with the rising level of liquid within the casing of the apparatus to release the valve and the lower float, said lower float when released being shifted upward automatically to more the shifted valve and place the pressure inletin communication with the portin the valve casing, and means operated by the downward movement of the lower float with the level of the liquid in the easing: of the apparatus for returning the valve and the locking means to normal positions.

2. The combination with a main casing having; a valved liquid inlet and an outlet pipe extending; into the casing and having check valve of a valve casing: within the main casing and havingpressure inlet and an exhaust outlet, superposed independently operating floats within the main casing and guided by the outlet pipe means for holding the valve in the valve casings; normally in one position to permit the exhaust of air from the apparatus and for holding one oi the floats against movement and means operated by the rise of the other float for releasing the valve and the hold float to shift the valve and place the pressure inlet in communication with the interior of the apparatus.

3. lhe combination with a main casing having a valved liquid inlet, of an outlet pipe within the casing having a check valve,

passage, means operated by the rise of one Intestimony thatI claim the foregoing as of the'fioats for releasing the valve, and my own, I have hereto affixed my signature 7 means operated by the other float when the in the presence of two Witnesses.

valve is released for shifting the valve to JAMES L. WRAY. 5 close the exhaust passage andfplace the pres- Witnesses v I sure passage in communication With the v LEONIDAS B. RUSK,

port. r JAMES L. DART. 

